Short-term medication of dapagliflozin exacerbates CCl4 induced acute liver injury / 西安交通大学学报(医学版)

【Objective】 To investigate the role and mechanism of dapagliflozin (Dapa), a sodium glucose co-transporter 2 inhibitor, in acute liver injury. 【Methods】 Eight-week-old C57BL6/J mice were given a single intraperitoneal injection of CCl4 to induce acute liver injury. The mice were preventively given 5 mg/kg Dapa by gavage 24 h and 2 h before CCl4 injection, while those in the control group were given an equal volume of solvent gavage. After 24 h, the mice were anesthetized and sacrificed. H&E staining, plasma biochemistry, RT-qPCR, and Western blotting were used to detect the severity of liver injury and the expressions of macrophage-related genes. 【Results】 In the CCl4 group, hepatic infiltration of inflammatory cells increased, and liver and renal functions significantly deteriorated, which was further aggravated by Dapa. CCl4 could promote the expressions of M1 macrophages and fibrosis-related genes in the liver, but reduce those of M2 and antioxidant-related genes, and the latter was further inhibited by Dapa. In addition, the protein expression of arginase 1 decreased and that of SGLT2 increased after Dapa intervention, while NF-κB pathway did not change significantly, suggesting that Dapa might directly affect the energy metabolism homeostasis in the liver and aggravate acute liver injury induced by CCl4. 【Conclusion】 Dapa can exacerbate hepatic and renal damage in acute stage of liver injury, inhibit macrophages M2 polarization, and aggravate oxidative stress and inflammatory injury induced by CCl4.

A heart rate detection method for wearable electrocardiogram with the presence of motion interference / 生物医学工程学杂志

The dynamic electrocardiogram (ECG) collected by wearable devices is often corrupted by motion interference due to human activities. The frequency of the interference and the frequency of the ECG signal overlap with each other, which distorts and deforms the ECG signal, and then affects the accuracy of heart rate detection. In this paper, a heart rate detection method that using coarse graining technique was proposed. First, the ECG signal was preprocessed to remove the baseline drift and the high-frequency interference. Second, the motion-related high amplitude interference exceeding the preset threshold was suppressed by signal compression method. Third, the signal was coarse-grained by adaptive peak dilation and waveform reconstruction. Heart rate was calculated based on the frequency spectrum obtained from fast Fourier transformation. The performance of the method was compared with a wavelet transform based QRS feature extraction algorithm using ECG collected from 30 volunteers at rest and in different motion states. The results showed that the correlation coefficient between the calculated heart rate and the standard heart rate was 0.999, which was higher than the result of the wavelet transform method (

Teaching design and thinking of the online course of "operation and maintenance of the first-aid medical equipment in grass-roots forces" / 中华医学教育探索杂志

Based on the requirements of military professional education reform and in view of the problems existing in the operation and maintenance of first-aid medical equipment in grass-roots forces. We put forward a construction scheme of online course which named operation and maintenance of first-aid medical equipment in grass-roots forces, and then expound the scheme from teaching content construction and teaching mode construction. The teaching content construction consists of two parts: the management theory of conventional medical equipments and the operation and maintenance teaching of specific first-aid medical equipments. In the construction of teaching mode, we elaborate on the organization forms of teaching, answering questions, training and examination units in detail. The design scheme of the online course is in line with the learning characteristics and meets the demand of learning the knowledge of the operation and maintenance of first-aid medical equipment systematically, so as to improve the post competency of the grass-roots forces.

Recent advances in external cardiac defibrillation techniques / 生物医学工程学杂志

As an important medical electronic equipment for the cardioversion of malignant arrhythmia such as ventricular fibrillation and ventricular tachycardia, cardiac external defibrillators have been widely used in the clinics. However, the resuscitation success rate for these patients is still unsatisfied. In this paper, the recent advances of cardiac external defibrillation technologies is reviewed. The potential mechanism of defibrillation, the development of novel defibrillation waveform, the factors that may affect defibrillation outcome, the interaction between defibrillation waveform and ventricular fibrillation waveform, and the individualized patient-specific external defibrillation protocol are analyzed and summarized. We hope that this review can provide helpful reference for the optimization of external defibrillator design and the individualization of clinical application.

Therapeutic inhibition of SGK1 suppresses colorectal cancer

Colorectal cancer (CRC) is one of the leading causes of death worldwide. Thus, the development of new therapeutic targets for CRC treatment is urgently needed. SGK1 is involved in various cellular activities, and its dysregulation can result in multiple cancers. However, little is known about its roles and associated molecular mechanisms in CRC. In present study, we found that SGK1 was highly expressed in tumor tissues compared with peri-tumor samples from CRC patients. In vitro experiments revealed that SGK1 overexpression promoted colonic tumor cell proliferation and migration and inhibited cell apoptosis induced by 5-fluorouracil (5-FU), while SGK1 shRNA and inhibitors showed the inverse effects. Using CRC xenograft mice models, we demonstrated that knockdown or therapeutic inhibition of SGK1 repressed tumor cell proliferation and tumor growth. Moreover, SGK1 inhibitors increased p27 expression and promoted p27 nuclear accumulation in colorectal cancer cells, and p27 siRNAs could attenuate the repression of CRC cell proliferation induced by SGK1 inhibitors. Collectively, SGK1 promotes colorectal cancer development via regulation of CRC cell proliferation, migration and survival. Inhibition of SGK1 represents a novel strategy for the treatment of CRC.

Combined use of matrix metalloproteinase-9 and N-terminal pro-brain natriuretic peptide in risk stratification of non-ST elevation acute coronary syndrome / 西安交通大学学报(医学版)

Objective To explore the role and relationship of N-terminal pro-brain natriuretic peptide (NT-proBNP) and matrix metalloproteinase-9 (MMP-9 ) in risk stratification and prognosis assessment of non-ST elevation acute coronary syndrome (NSTE-ACS).Methods We recruited 114 patients with NSTE-ACS and classified them into three groups according to the GRACE risk stratification:high-risk,intermediate-risk and low-risk groups.Another 5 8 patients were recruited as controls.Arterial blood was collected before angiography for the measurement of serum NT-proBNP and MMP-9 .Gensini score was used to evaluate the degree of coronary artery stenosis.All the patients were followed up for 6 months and MACE was observed and recorded.Results ① The levels of lg NT-proBNP and MMP-9 significantly differed between the groups (P<0.05).② ROC curve analysis showed that lg NT-proBNP could predict MACE of NSTE-ACS;area under the curve was 0.795,the cutoff value was 2 .0 6 9 ,corresponding to the NT-proBNP value of 1 1 6 .5 6 ng/L.MMP-9 could predict MACE of NSTE-ACS;area under the curve was 0 .6 9 6 ,the cutoff value was 3 2 .4 9 ng/ml;both of the abnormal indexes could predict MACE with the sensitivity of 80.41%,specificity of 82.19%,and Youden’s index of 0.63.③ Cox regression analysis showed that abnormal MMP-9 and NT-proBNP levels were independently related to the incidence of MACE by the value of OR as 3.751.Conclusion MMP-9 and NT-proBNP may be used as serological indicators in risk stratification of NSTE-ACS. The combined use of NT-proBNP and MMP-9 increases the power of predicting MACE.

Relationship of plasma levels of microRNA 491-5p and its target gene polymorphism with the prognosis of patients with premature coronary artery disease / 西安交通大学学报(医学版)

Objective To study the relationship of the plasma levels of miRNA-491-5p in Han population in Shaanxi Province and the changes of single nucleotide polymorphisms (SNP ) of the target gene matrix metalloproteinases-9 (MMP-9 ) of miRNA-4 9 1-5 p (has-miR-4 9 1-5 p ) with the incidence risk and prognosis of premature coronary artery disease (pCAD)through the case-control design.Methods In this study,we made a consecutive recruitment of 270 pCAD cases in the case group and 300 cases in the control group.Using the polymorphism method of polymerase chain reaction and restriction fragment length (PCR-RFLP),target gene MMP-9 of has-miR-491-5p and rs1056628 genotypes was detected to compare the association between the variant genotypes and pCAD.Results In the changes of rs1056628C-A polymorphisms,compared with that of CC genotypes (the incidence was 42%),the risks of having coronary heart disease in the individuals carrying CA and AA genotypes were 31%,the difference was statistically significant (P=0.045).The risks of developing coronary heart disease in the individuals carrying CA and AA genotypes were reduced more significantly in the population with low total cholesterol (TC),and low low-density lipoprotein cholesterol (LDL-C).Conclusion Target gene MMP-9 of has-miRNA-491-5p rs1056628C-A polymorphism is associated with the reduced incidence risk of pCAD,and carrying C alleles is an independent risk factor for pCAD.

Correlation of glycated hemoglobin,fibrinogen and cystatin C with the severity of coronary artery lesions in non-diabetic patients / 西安交通大学学报(医学版)

Objective To investigate the relationship of glycated hemoglobin (HbA1c),fibrinogen (Fbg)and cystatin C (Cys C)with the severity of coronary artery lesions in non-diabetic patients.Methods We enrolled 358 patients who received coronary angiography (CAG)in this study.They were divided into coronary artery disease (CAD)group and non-CAD group according to CAG results.Moreover,according to different clinical types of CAD,all the CAD patients were further classified into stable angina pectoris (SAP)group and acute coronary syndrome (ACS)group.We calculated Gensini score and divided CAD group into A,B and C subgroups by Gensini score.HbA1 c,Fbg,Cys C and other clinical data were measured and compared between groups,and the correlation analysis was used to find the relationship of HbA1c,Fbg and Cys C with Gensini score.Results The levels of HbA1 c,Fbg and Cys C were significantly higher in groups A,B and C than in non-CAD group.When Gensini score increased,the three indexes were increased too (P<0.05).The levels of HbA1c,Fbg and Cys C were significantly higher in ACS group than in SAP and non-CAD group (P<0.05).After adjustment for the influencing factors, HbA1 c was still associated with Fbg (P<0 .0 5 ).The levels of HbA1 c and Fbg were closely related to Gensini score (P<0.05).Conclusion In non-diabetes patients,HbA1c and Fbg are significantly related to the severity of coronary artery stenosis,and Cys C may not be an independent risk factor of coronary artery stenosis.

Short period of mild hypothermia improves resuscitation outcome in a porcine model of prolonged ventricular fibrillation / 中华急诊医学杂志

Objective To investigate the resuscitation outcome after a short period of mild hypothermia in porcine model of prolonged ventricular fibrillation (VF).Methods Fourteen male healthy domestic swine weighting 34 to 36 kg were used.VF was induced electrically and maintained untreated for 11 mins,followed by manual cardiopulmonary resuscitation (CPR) procedure.Two investigators initiated chest compression and bag-valve mask ventilation in pattern of 2 min rotation.A biphasic wave of 120 J electric defibrillation (ED) was attempted 6 mins after CPR.If there was no return of spontaneous circulation (ROSC),CPR was restored and ED was delivered when necessarily.Resuscitation was considered unsuccessful if absence of ROSC for 12 mins.However,if ROSC occurred,animals were randomly (random number) diveded into normothermia (NT) group and hypothermia treatment (CH) group.Animals in CH group were immediately cooled by using intravenous infusion of ice-cold saline and surface cooling.Core temperature was reduced to 32-34 degrees centigrade within 120 mins and maintained at this level for 2 h.Active rewarming was completed within 2 h until baseline body temperature was reached.Data of hemodynamic variables,blood-gas analysis and blood lactate before VF of two groups were recorded.Meawhile,cardiac output (CO),heart rate and Tc after ROSC were recorded.Neurological defect scores (NDS) were evaluated every 24 h until 96 h after ROSC.Variables were compared using either Fisher test or repeated measures analysis of variance,followed by Bonferroni for multiple comparisons.A two-sided P value ＜0.05 was regarded statistically significant.Results There was no significant difference in body weight,mean arterial pressure,CO,pH,pressure of end-tidal carbon dioxide (ETCO2) and lactate between groups before VF.In the period of CPR,there were also no significant difference in total resuscitation time,first shock success rate,ROSC rate,shock ROSC rate,total number of shock and doses of epinephrine.However,animals in CH group survived longer time than that in NT groups [(96.00 ± 0.00) hvs.(49.71 ±43.65) h,P=0.031].Meanwhile,the survival rate of 96 h was significantly higher in CH than that in NT (P ＜ 0.05).For neurological function,there was a obviously better NDS in CH group than that in NT group within ROSC 96 h (P ＜ 0.05).Conclusion Even a short duration of 2 hour mild hypothermia could improve resuscitation outcome in porcine model of 11 minute VF.

An analysis of occupational hazard in manufacturing industry in Guangzhou, China, in 2013 / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To provide data for the occupational health supervision by analyzing the occupational health status in manufacturing industry in Guangzhou, China.</p><p><b>METHODS</b>The occupational health investigation was performed in 280 enterprises randomly selected from 8 industries based on industry stratification. According to the occupational health standards, 198 out of the 280 enterprises were supervised and monitored. Sample testing was performed in 3~5 workplaces where workers were exposed to the highest concentration/intensity of occupational hazard for the longest time. Comparative analyses of the overproof rates of hazard were performed among enterprises, workplaces, and testing items from different industries.</p><p><b>RESULTS</b>The concentrations of occupational hazard in 42.93% (85/198) of enterprises and 22.96% (200/871) of workplaces were above the limit concentration. The most severe hazards were the noises in shipbuilding and wooden furniture industries and the welding fumes in shipbuilding industry. Less than 30% of enterprises were able to provide occupational health examination and periodic test reports of occupational hazard in workplaces. The rate of the workers with abnormal occupational health examination results and the need for reexamination reached 6.63% (832/12 549), and they were mostly from shipbuilding, wooden furniture, and chemical industries.</p><p><b>CONCLUSION</b>The occupational health supervision should be strengthened in enterprises, and hazard from noises and dusts should be selectively controlled or reduced. The publication of relevant data and information of occupational health in enterprises should be promoted to enhance social supervision.</p>

A dynamic study of sentinel surveillance for occupational hazard in typical industrial enterprises in Guangzhou, China, from 2012 to 2014 / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To perform a sampling survey of occupational hazard in typical industrial enterprises in Guangzhou, China, by means of sentinel surveillance, to understand the classification, distribution, and concentration/intensity of occupational hazard as well as the characteristics and development of occupational health management in Guangzhou, and to provide a scientific basis for occupational health supervision.</p><p><b>METHODS</b>Fifteen enterprises in information technology (IT), shipbuilding, chemical, leather and footwear, and auto repair industries were enrolled as subjects. Dynamic surveillance for occupational hazard and occupational health management was performed in workplaces of those enterprises.</p><p><b>RESULTS</b>The overall overproof rate of occupational hazard in the 15 sentinel enterprises from 2012 to 2014 was 6.16% (45/731). There was no significant difference in the overproof rate between the three years (P > 0.05). During the three years, enterprises in shipbuilding industry had significant higher overproof rates than those in other industries (P < 0.05). According to the results of occupational health management questionnaire, the overall coincidence rate of survey items was 57.88% (393/679); enterprises in IT industry had significant lower coincidence rates than those in other industries in 2012 and 2014 (47.62%, 29.63%; P < 0.05), while enterprises in leather and footwear industry had significant lower coincidence rates than those in other industries in 2013 (40.63%; P < 0.05).</p><p><b>CONCLUSION</b>The enterprises in shipbuilding industry are the key to the prevention and control of occupational hazard in Guangzhou. To strengthen surveillance for occupational health in workplaces in Guangzhou, it is important to enhance occupation health supervision among small and micro enterprises and develop continuous sentinel surveillance for occupational hazard in key industries.</p>

Technical Research of Non-contact Electrocardiogram Based on Capacitive Coupling / 生物医学工程学杂志

Based on the capacitance coupling principle, we studied a capacitive way of non-contact electrocardiogram (EGG) monitoring, making it possible to obtain ECG on the condition that a patient is habilimented. Conductive fabric with a good electrical conductivity was used as electrodes. The electrodes fixed on a bed sheet is presented in this paper. A capacitance comes into being as long as the body gets close to the surface of electrode, sandwiching the cotton cushion, which acts as dielectric. The surface potential generated by heart is coupled to electrodes through the capacitance. After being processed, the signal is suitable for monitoring. The test results show that 93.5% of R wave could be detected for 9 volunteers and ECG with good signal quality could be acquired for 2 burnt patients. Non-contact ECG is harmless to skin, and it has advantages for those patients to whom stickup electrodes are not suitable. On the other hand, it is convenient to use and good for permanent monitoring.

The value of high-sensitivity C-reactive protein combined with high-sensitivity cardiac troponin T for prognosis of patients with acute coronary syndrome / 中国医师进修杂志

Objective To investigate the value of high-sensitivity C-reactive protein (hs-CRP) combined with high-sensitivity cardiac troponin T (hs-cTnT) for prognosis of patients with acute coronary syndrome (ACS).Methods One hundred and eighteen patients with ACS were selected from July 2011 to December 2012.According to the clinical feature,they were divided into unstable angina pectoris (UAP) group (38 cases),non ST segment elevation myocardial infarction (NSTEMI) group (38 cases) and ST segment elevation myocardial infarction (STEMI) group(42 cases).They were followed up for 3 months,and the incidence of cardiovascular events and cardiac death was observed.Twenty healthy people were selected as control group.Results The serum level of hs-CRP on admission in UAP group,STEMI group,NSTEMI group was higher than that in control group,and NSTEMI group was highest.And there was significant difference between NSTEMI group and STEMI group,and also between NSTEMI group and control group (P ＜ 0.05).The serum level of hs-cTnI was increased in STEMI group and NSTEMI group.The increased degree in STEMI group was higher than that in NSTEMI group,and there was significant difference (P ＜0.05).The incidence of cardiovascular events and cardiac death within 3 months after discharge in patients with the serum level of hs-CRP ≥ 3 mg/L on admission in UAP group and NSTEMI group,STEMI group was 6/11,40.0％ (12/30),46.4％ (13/28),which was higher than that in patients with the serum level of hs-CRP ＜ 3 mg/L[11.1％(3/27),3/8,5/14],and there was significant difference(P＜ 0.05).The incidence of cardiovascular events and cardiac death within 3 months after discharge in patients with the serum level of hs-cTnT≥ 1.0 μ g/L on admission in NSTEMI group and STEMI group was 16.7％(5/30) and 18.4％(7/38),which was higher than that in patients with the serum level of hs-cTnT ＜ 1.0 μ g/L (1/8,1/4),and there was significant difference (P ＜ 0.05).Conclusion Significantly increased hs-CRP is an important predictor of poor prognosis of ACS patients.hs-CRP combined with hs-cTnT is helpful in early identification of high-risk patients.Giving intensive treatment to these patients in time and monitoring closely after discharge can reduce the happening of cardiovascular events.

Development of automatic urine monitoring system / 中国医疗器械杂志

An automatic urine monitoring system is presented to replace manual operation. The system is composed of the flow sensor, MSP430f149 single chip microcomputer, human-computer interaction module, LCD module, clock module and memory module. The signal of urine volume is captured when the urine flows through the flow sensor and then displayed on the LCD after data processing. The experiment results suggest that the design of the monitor provides a high stability, accurate measurement and good real-time, and meets the demand of the clinical application.

Development and animal tests of a miniaturized electrical chest compression device / 生物医学工程学杂志

This paper introduces the development and animal tests of a miniaturized electrical chest compression device. Based on pulse width modulation technology produced by micro control unit, the device can control the frequency and depth of the compression accurately, as well as perform real-time adjustment. Therefore, it can perform continuous and stable chest compression for long time, which may increase the successful rate of cardiopulmonary resuscitation (CPR). Besides, the device can also produce different types of compression waveforms, including trapezoidal and triangular waveforms. Then, the performance and efficacy of the device was assessed with a rat model of asphyxial cardiac arrest (CA).

The impact of telmisartan on angiotensin converting enzyme 2 mRNA expression in monocyte-derived macrophages of diabetic hypertensive patients / 中华内科杂志

Objective To investigate the effects of telmisartan on the expression of angiotensin converting enzyme2 (ACE2) mRNA in monocyte-derived macrophages of hypertensive patients companied with diabetes.Methods 62 essential hypertensive patients companied with diabetes were randomly divided into two groups:regular treatment group,and telmisartan group.Then the content of ACE and ACE2 in serum was detected by ELISA,and the expression of ACE mRNA and ACE2 mRNA in monocyte-derived macrophages of patients was detected by RT-PCR before and after having been treated.Results (1) After having been treated for 4 weeks and 12 weeks,the blood pressure of the patients in two groups were decreased significantly,Comparing with regular group,telmisartan group seemed to have more obvious therapeutic effect (P ＜ 0.05) ; (2) After having been treated for 12 weeks,glycosylated hemoglobin diseased in both group,but there was no significant difference between the two group (P ＞ 0.05) ; (3) In telmisartan group,the content of ACE2 in serum was increased after having been treated for 12 weeks than that in regular treatment group,[(23.9 ± 8.2) U/L vs (16.3 ± 8.9) U/L,P ＜ 0.05] ; and the expression of ACE2 mRNA in monocyte-derived macrophages in telmisartan group was obviously increased after 12 weeks comparing with regular treatment group (0.73 ±0.06 vs 0.51 ±0.04,P ＜0.01).Conclusion The role of telmisartan in decreasing blood pressure and it's advantage to the metabolism of glucose are partly related with the up-regulation of ACE2 mRNA.

Study for portable dynamic ECG monitor and recorder / 中国医疗器械杂志

This Paper presents a portable dynamic ECG monitor system based on MSP430F149 microcontroller. The electrocardiogram detecting system consists of ECG detecting circuit, man-machine interaction module, MSP430F149 and upper computer software. The ECG detecting circuit including a preamplifier, second-order Butterworth low-pass filter, high-pass filter, and 50Hz trap circuit to detects electrocardiogram and depresses various kinds of interference effectively. A microcontroller is used to collect three channel analog signals which can be displayed on TFT LCD. A SD card is used to record real-time data continuously and implement the FTA16 file system. In the end, a host computer system interface is also designed to analyze the ECG signal and the analysis results can provide diagnosis references to clinical doctors.

The clinical significance of S/CO qualitative determination of hepatitis B surface antibody / 国际检验医学杂志

Objective To study the relativity of S/CO qualitative determination of hepatitis B surface antibody and quantitative assay.Methods The different concentrations of sera were determined with time-resolved fluorescence immunoassay and enzyme-linked immunosorbent assay. The standard curve was drawn and the equation was established.Results In the curve, S/CO level was positively correlative to the quantitative detection value, and the conversion equation was Y=8.911 8×e0.177 4X.The intraclass correlation coefficient of S/CO calculating level and quantitative value was 0.934.Conclusion The content of hepatitis B surface antibody can be estimated by S/CO value. It can be used in basic-level laboratories which don′t undertake the quantitative determination of HBV markers.

An intervention study about preventing blood return when using nitroglycerin for patients with heart failure / 中国实用护理杂志

ObjectiveTo investigate the effective method of preventing blood return when using nitroglycerin for patients with heart failure. Methods Using physiological saline solution or 5% glucose with nitroglycerin pumped into the same vein for patients at the same time, and then observed the condition of blood returning, recorded the critical drop-speed which can effective prevented blood return. Observed the influence of added solution on heart function of patients with heart failure. Results Pumped physiological saline solution or 5% glucose with nitroglycerin in the same time with the speed of 5ml/h can effective prevent the blood return, and the added solution can not influence the heart function for patients with heart failure significantly. Conclusion Pumped physiological saline solution or 5% glucose with nitroglycerin into the same vein at the same time can effective preventing the blood return, and the added solution can not influence the heart function for patients with heart failure significantly.

Nonlinear predictability analysis of diabetic autonomic neuropathy / 中国组织工程研究

BACKGROUND: Researches on the diagnosis and detection methods of diabetic autonomic neuropathy(DAN) is very weak at present.OBJECTIVE: To get the data about the degree of autonomic neuropathy by using the nonlinear heart rate variability(HRV) so as to provide clinical evidence for the early diagnosis of DAN.DESIGN: A single sample study.SETTINGS: Computer department in a university; Staff room of medical physics of department of biomedical engineering in a university.PARTICIPANTS: The experiment was completed in the Staff Room of Medical Physics, Department of Biomedical Engineering in the First Military Medical University of Chinese PLA from March to May 2002. Thirty-four diabetic patients, including 22 with DAN complications, were selected from the inpatients of Department of Endocrinology in the Affiliated Nanfang Hospital of the First Military Medical University of PLA, and other 40 normal subjects, who were from the faculty in the First Military Medical University of Chinese PLA and students in the Department of Physical Education, Chinese PLA Institute of Physical Education, were taken as the controls. The R wave to R wave intervals(RRI) time series is sampled and corrected to 512 points for analysis.INTERVENTIONS: Based on the virtual instrumental workbench-LabVIEW, 74 standard adjacent RRI signals were selected from 34 diabetic patients and 40 normal cases, and then analyzed with the method of nonlinear predictability.MAIN OUTCOME MEASURES: Collective and analytical results of the 74 standard adjacent RRI signals.RESULTS: There was no significant difference between the diabetic patients without DAN and the controls by the analysis with normalized mean square error(NMSE) NMSE ( P = 0. 075 ), but the significant difference between the DAN patients and the controls( P = 0. 001) . While significant analysis between the diabetic patients without DAN complications and the controls was significant by the analysis of mean absolute error(MAE) (P = 0. 007 and P = 0. 000), there was also significant difference between the diabetic patients with and without DAN ( P = 0. 001 ).CONCLUSION: Different impaired degree of autonomic nerve system in diabetic patients can result in nonlinear reduction in HRV analysis, but nonlinear predictability analysis can prove the nonlinear model of HRV,. and can also provide important state information of sympathetic and parasympathetic systems so that it can provide reliable evidence for the earlier diagnosis and the prognosis evaluation of DAN.